.box{
    width: 100%;
    height: 100vh;
    background: url(../image/baidu_bg.jpg) center top no-repeat;
}
a{
    text-decoration: none;
}
.box .bd_top{
    width: 100%;
    height: 60px;
    background: rgba(0,0,0,0.3);
    line-height: 60px;
}
.box .bd_top .left{
    float: left;
}
.box .bd_top .left li {
    float: left;
    margin-left: 25px
}
.box .bd_top .left li a{
    display: block;
    height: 60px;
    font-size: 14px;
    color: #fff;
}
.box .bd_top .right{
    float: right;
    width: 500px;
}
.box .bd_top .right ul{
    float: right;
}
.box .bd_top .right ul li{
    float:left;
    margin-right: 35px;
}
.box .bd_top .right ul li a{
    font-size: 14px;
    color: #fff;
}
.box .bd_top .right ul li span{
    color: #fff;
    font-size: 14px;
    float: left;
}
.box .bd_top .right ul li img{
    width: 28px;
    height: 28px;
    border-radius: 28px;
    margin-top: 16px;
    margin-right: 10px;
    float: left;
}
.bd_bm{
    margin: 50px center;
    margin-left: 400px;
    height: 300px;
    width: 500px;
}
.bd_bm .lg{
    width: 500px;
    height: 265px;
    position: relative;
}
.bd_bm .lg img{
    width: 270px;
    height: 130px;
    position: absolute;
    left: 115px;
    bottom: 20px;
}
.bd_bm .input{
    width: 500px;
    height: 40px;
    position: relative;
}
.bd_bm .input input{
    width: 400px;
    height: 40px;
    padding-left: 10px;
    float: left;
    border: 3px solid #4569ff;
    border-radius: 6px 0px 0px 6px;
}

.voc{
    width: 24px;
    height: 20px;
    background: url(../image/nicon-img.png) no-repeat;
    background-position: 0px -2px;
    position: absolute;
    right: 140px;
    top: 10px;
    cursor: pointer;
}
.input::before{
    content: "";
}
.input::after{
    content: "";
}

.voc:hover{
    background-position: 0px -26px;
}


.img{
    width: 24px;
    height: 20px;
    background: url(../image/nicon-img.png) no-repeat;
    background-position: 0px -51px;
    position: absolute;
    right: 110px;
    top: 10px;
    cursor: pointer;
}
.img:hover{
    background-position: 0px -75px;
}


.bd_bm .input button{
    float: left;
    width: 100px;
    height: 40px;
    border: none;
    color: #fff;
    font-weight: 700;
    background:#4569ff;
    font-size: 16px;
    border-radius: 0px 6px 6px 0px;
    cursor: pointer;
}



